Preparation method of long-size dispersion strengthening copper-based composite material and casting device thereof

A technology of copper-based composite materials and dispersion-strengthened copper, which is applied in the field of composite material preparation technology and equipment, copper-based composite material preparation technology and special equipment, to achieve the effects of avoiding small-scale agglomeration, shortening production cycle and improving productivity

Active Publication Date: 2013-10-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the solidification process, ceramic particles will gather and agglomerate at the solid-liquid interface. In order to solve this major problem, the present invention uses an opposing rotating magnetic field at the solid-liquid interface to drive the copper melt at the front of the solidification interface to perform complex turbulent movement and rubbing. Twisting movement, so that the ceramic par

Method used

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  • Preparation method of long-size dispersion strengthening copper-based composite material and casting device thereof
  • Preparation method of long-size dispersion strengthening copper-based composite material and casting device thereof
  • Preparation method of long-size dispersion strengthening copper-based composite material and casting device thereof

Examples

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Example Embodiment

[0044] Example one:

[0045] In this embodiment, see figure 2 with image 3 , A long size Al 2 O 3 Preparation method of dispersion strengthened Cu-based composite material, using Al 2 O 3 As the reinforcing phase dispersion material, red copper is used as the matrix material, that is, Al is added to the copper melt according to the mass fraction of 5%. 2 O 3 The ceramic powder particles adopt the method of mechanically stirring the copper melt, and use the combination of two opposite rotating magnetic fields to generate strong turbulence at the front of the copper melt solidification interface, fully stir, and use the upward continuous casting process to make the upward continuous Cu-Al prepared during casting 2 O 3 The grain of the composite material is refined, and the strengthening phase Al 2 O 3 The dispersed particles are uniformly distributed in the copper-based composite material to prepare long-size Al 2 O 3 Dispersion strengthened Cu-based composite material.

[0046] In ...

Example Embodiment

[0051] Embodiment two:

[0052] This embodiment is basically the same as the first embodiment, and the special features are:

[0053] In this embodiment, silicon carbide whiskers are used as the reinforcing phase dispersion material. The silicon carbide whiskers used are fine whiskers with a diameter of less than 10 μm and an aspect ratio of more than 20. The powder pushing device 6 is also used at 1150°C. Send the small silicon carbide whiskers to the bottom of the copper liquid at a speed of 5mm / s. The density of the silicon carbide whiskers is less than that of the copper liquid, and will slowly float up under the action of buoyancy, and will be dispersed under the action of the graphite stirring paddle 10, and wait until it floats to the bottom. When the solid-liquid solidification interface is at the front, it is uniformly distributed under the action of the strong turbulence generated by the 200mT rotating magnetic field, and at the same time is swallowed by the solidificati...

Example Embodiment

[0054] Embodiment three:

[0055] This embodiment is basically the same as the previous embodiment, and the special features are:

[0056] In this embodiment, graphite particles with a diameter of 0.1 μm are fed into the bottom of the copper liquid as the strengthening phase. The addition rate is the same as the previous example. The powder pushing device 6 adopts the advancing speed of 5mm / s, and the riser rod 2 adopts 5mm. / s, slowly pulled up under the action of a 200mT rotating magnetic field, and prepared a graphite particle dispersion strengthened Cu-based composite material with a strengthening phase volume fraction of 8%.

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Abstract

The invention discloses a preparation method of a long-size dispersion strengthening copper-based composite material. The preparation method comprises the following steps of: adding strengthening phase material dispersion particles in a copper melt, utilizing a mechanical stirring method on the copper melt, adopting two apposition rotating magnetic field combining manners to generate powerful turbulence on the front edge of a copper melt solidification interface, adding an upper leading continuous casting process, refining the copper-based composite material particles prepared in the upper leading continuous casting process, enabling the strengthening phase material dispersion particles to uniformly distribute in the copper-based composite material, and preparing the long-size dispersion strengthening copper-based composite material. The invention also discloses a copper-based composite material casting device. The preparation method and the copper-based composite material casting device provided by the invention can realize serialization production, the prepared long-size dispersion strengthening copper-based composite material can keep the high electric conductivity, meanwhile, the intensity of the long-size dispersion strengthening copper-based composite material is greatly improved, in addition, the equipment is simple, the long-size dispersion strengthening copper-based composite material can be produced in a large scale, the production cycle is shortened, and the long-size dispersion strengthening copper-based composite material has the good economic benefits.

Description

technical field [0001] The invention relates to a composite material preparation process and equipment, in particular to a copper-based composite material preparation process and special equipment, which are applied in the technical field of composite material solidification. Background technique [0002] As a material with good electrical and thermal conductivity, copper-based composite materials have attracted much attention in social life, but because pure copper is a very soft material, it is limited in some applications, so the improvement of copper-based materials The intensity has become the focus of scholars' research. In general, the methods to improve the strength of copper-based materials are: strain strengthening, solid solution strengthening and aging strengthening, but because the above three strengthening methods will cause crystal defects, such as: dislocations, vacancies and lattice distortion, so although copper-based The strength of the material is improv...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C1/10B22D11/04B22D11/115
Inventor 钟云波李明杰杨辉王怀李强周鹏伟任维丽雷作胜黄靖文
Owner SHANGHAI UNIV
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